Roadside Bicycle Flat Repair Instructions
Tools and supplies needed to change a flat tire:
1. Determine which tire has gone flat, release the brakes using the brake release mechanism, and remove the wheel from the bike. If the flat is on the rear wheel shift the derailleur and chain all the way to the bottom sprocket. This aids in replacing the rear wheel by putting the chain on the bottom sprocket.
2. Pinch the tire all around its edges the same way you would pinch your nose. This releases the seating surfaces of the tire from the rim.
3. Use the tire lever to pry the edge of the tire out from the rim, working on one side only. Use more than one tire lever if necessary. Hook the end of each lever on a spoke after prying the edge of the tire out of the groove. This will help if the tire is tight on the wheel.
4. Remove the stem of the tube from the rim, and then the rest of the tube.
5. Make sure that you determine the cause of the puncture, by brushing your fingers around the inside of the tire, feeling for some sort of a sharp object. Or by putting some air in the tube with your pump to see exactly what made your tire go flat. Make sure that you have determined the cause of the puncture and have removed the problem before putting the new tube in.
6. At this point patch the tube (using the instructions provided with the patch kit) or use a new tub. The latter is the most advisable for emergency road side repair.
7. Inflate the tube with your pump, just enough to give it some shape so all the wrinkles and creases are smoothed out.
8. Put the stem of the tube in the hole of the rim, by pulling the edge of the tire back and exposing the stem hole in the rim.
9. Start putting the tube back inside of the tire, working equally from the stem on both sides around the tire.
10. Push the tire back over the edge of the rim from which it came from, again working equally from the stem on both sides around the tire.
11. Using your pump, inflate the tube to the specifications listed on the outside of the tire.
12. Reinstall the wheel. Refer to step # 1 for rear wheel replacement.